diff options
| -rw-r--r-- | src/mesa/drivers/dri/i965/brw_fs_copy_propagation.cpp | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/src/mesa/drivers/dri/i965/brw_fs_copy_propagation.cpp b/src/mesa/drivers/dri/i965/brw_fs_copy_propagation.cpp index 055444d4c99..144a43f85ac 100644 --- a/src/mesa/drivers/dri/i965/brw_fs_copy_propagation.cpp +++ b/src/mesa/drivers/dri/i965/brw_fs_copy_propagation.cpp @@ -167,6 +167,7 @@ fs_copy_prop_dataflow::run() do { progress = false; + /* Update liveout for all blocks. */ for (int b = 0; b < cfg->num_blocks; b++) { for (int i = 0; i < bitset_words; i++) { BITSET_WORD new_liveout = (bd[b].livein[i] & @@ -176,10 +177,14 @@ fs_copy_prop_dataflow::run() bd[b].liveout[i] |= new_liveout; progress = true; } + } + } - /* Update livein: if it's live at the end of all parents, it's - * live at our start. - */ + /* Update livein for all blocks. If a copy is live out of all parent + * blocks, it's live coming in to this block. + */ + for (int b = 0; b < cfg->num_blocks; b++) { + for (int i = 0; i < bitset_words; i++) { BITSET_WORD new_livein = ~bd[b].livein[i]; foreach_list(block_node, &cfg->blocks[b]->parents) { bblock_link *link = (bblock_link *)block_node; |